This website uses cookies to deliver some of our products and services as well as for analytics and to provide you a more personalized experience. Click here to learn more. By continuing to use this site, you agree to our use of cookies. We've also updated our Privacy Notice. Click here to see what's new.

This website uses cookies to deliver some of our products and services as well as for analytics and to provide you a more personalized experience. Click here to learn more. By continuing to use this site, you agree to our use of cookies. We've also updated our Privacy Notice. Click here to see what's new.

About Optics & Photonics TopicsOSA Publishing developed the Optics and Photonics Topics to help organize its diverse content more accurately by topic area. This topic browser contains over 2400 terms and is organized in a three-level hierarchy. Read more.

Topics can be refined further in the search results. The Topic facet will reveal the high-level topics associated with the articles returned in the search results.

Abstract

A biosensor capable of highly sensitive detection of trace chromium (VI) with a simple hollow-core metal-cladding waveguide (HCMW) structure is theoretically modeled and experimentally demonstrated. Owing to the high sensitivity of the excited ultrahigh-order modes in the waveguide, a tiny variation of the extinction coefficients in the waveguide guiding layer where the chromate ions reacts with the diphenylcarbazide (DPC) can lead to a significant change of light intensity in the reflection spectrum. The experimental results indicate that using the proposed method, the chromium (VI) sensitivity detection limit can be as low as 1.2 nM, which represents a 16-fold improvement compared to the surface plasmon field-enhanced resonance light scattering (SP-RLS) method, and a 4-fold improvement compared to the flame atomic absorption spectrometry and fluorimetry spectroscopy, respectively.

A. Tunçeli and A. R. Türker, “Speciation of Cr(III) and Cr(VI) in water after preconcentration of its 1,5-diphenylcarbazone complex on amberlite XAD-16 resin and determination by FAAS,” Talanta 57(6), 1199–1204 (2002).
[Crossref] [PubMed]

2003 (1)

2002 (2)

A. Tunçeli and A. R. Türker, “Speciation of Cr(III) and Cr(VI) in water after preconcentration of its 1,5-diphenylcarbazone complex on amberlite XAD-16 resin and determination by FAAS,” Talanta 57(6), 1199–1204 (2002).
[Crossref] [PubMed]

Tunçeli, A.

A. Tunçeli and A. R. Türker, “Speciation of Cr(III) and Cr(VI) in water after preconcentration of its 1,5-diphenylcarbazone complex on amberlite XAD-16 resin and determination by FAAS,” Talanta 57(6), 1199–1204 (2002).
[Crossref] [PubMed]

Türker, A. R.

A. Tunçeli and A. R. Türker, “Speciation of Cr(III) and Cr(VI) in water after preconcentration of its 1,5-diphenylcarbazone complex on amberlite XAD-16 resin and determination by FAAS,” Talanta 57(6), 1199–1204 (2002).
[Crossref] [PubMed]

Sens. Actuators (1)

Talanta (3)

A. Tunçeli and A. R. Türker, “Speciation of Cr(III) and Cr(VI) in water after preconcentration of its 1,5-diphenylcarbazone complex on amberlite XAD-16 resin and determination by FAAS,” Talanta 57(6), 1199–1204 (2002).
[Crossref] [PubMed]

Fig. 2 Simulation results of the change of Rminwith the increasing of the distinction coefficient of the analyte in four different resonant configurations (Δκ≠0). (a) SPR, (b) LRSPR, (c) RSW, (d) HCMW.

Fig. 3 (a). ATR spectrums of different concentration of Cr (VI). Left curves are the whole ATR spectrums while the curves in middle part are the enlarged ones around Rmin; (b). Reflectance at coupled angle of different concentration of Cr (VI) and the concentration response curve (the fitted line).